Automatic damper.



v g/f latented May 12, 1903.;

PATENT OFFICE.

THOMAS W. KING, OF CLEVELAND, OHIO.

AUTOMATIC D AM PER.

SPECIFICATION forming part of Letters Patent No. 727,971, dated May 12, 1903.

' Application filed August 21,1902. Serial lie-120,521. (No model.)

To all whom it may concern:

Be it known that LTHoMAs W. KING, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga'and State of Ohio, have invented certain new and useful Improvements in Automatic Dampers; and I do hereby declare the following to be a full, clear and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this Referring specifically to the drawings, a-

smoke-pipe is indicated at 6, and the damper flap or plate at 7. This is preferably semicircular, or substantially so, and is supported within the pipe by means of a split ring 8, the

halves of which are hinged together at one end, as at 8, and joined at the other end by a bolt and nut 8 The ring carries brackets 9, which support the pivots of the damper, said pivots being formed by pointed screws 10, which are adj ustable and fixed at adj ustment by binding-nuts 10*. The points of these pivot-screws engage pins 11, which pass through holes in the ring and in'the pipe and enter sockets formed by hangers 7, riveted to the damper-plate. The pins and sockets are preferably hexagonal, so that the inclination of the damper may be varied, as hereinafter explained. The head of one of the pins is enlarged, as at 11, to receive an arm 12,

same conditions.

uponwhich slides a balancing-weight 12?, secured at adjustment by thumb-nut 12". The weight is set at adjustment according to the local conditions under which the damper is to operate, and the damper-plate is located on the pins at an angle determined by the Normally the damper by reason of the weight swings slightly open toward the direc tion from which the draft comos-'-in other words, toward the furnaceand theweight is so set that the damper is retained in this position under ordinaryor desired draft. As the'draft increases the damper is forced to a closedposition and will swing to or from its closed position according to the fluctuations in the draft and under the influence of the weight, the leverage of which increases as the damper is raised by the draft. The damper does not stop against any projection in the pipe, but is balanced by the weight to a desired normal position, which may be predetermined and varied according to circumstances.

At 7 is indicated a portion of the damperplate, which is made to project above the axis and curved upon itself to give weight with- ,out obstructing the pipe to any great extent.

The weight so placed serves to assist in balancing the damper.

What I claim as new is The combination with a pipe, of a damper comprising a valve-platewithin the pipe, having pin-sockets, a ring around the pipe having brackets thereon, pins extending through the ring and pipe and adj ustablyinto the sockets, adjustable pivot-screws supported in the brackets and engaging the outer ends of the pins, and an arm projecting from one of the pins and having an'adjustable weight thereon. In testimony whereof I affix my signature in presence of two witnesses. V

THOMAS W. KING. Witnesses:

JOHN A. BOMMHARDT, U. 0. SOHWERTNER. 

